Add SVG elements

SVG is now part of HTML 5. Add all the SVG elements from
https://developer.mozilla.org/en-US/docs/Web/SVG/Element with the
exception of "a", "script" and "style" elements.

parser/block.go

@@ -77,6 +77,71 @@ var (
 		"progress":   {},
 		"section":    {},
 		"video":      {},
+
+		// SVG
+		// "a": {},
+		"animate":             {},
+		"animateMotion":       {},
+		"animateTransform":    {},
+		"circle":              {},
+		"clipPath":            {},
+		"defs":                {},
+		"desc":                {},
+		"ellipse":             {},
+		"feBlend":             {},
+		"feColorMatrix":       {},
+		"feComponentTransfer": {},
+		"feComposite":         {},
+		"feConvolveMatrix":    {},
+		"feDiffuseLighting":   {},
+		"feDisplacementMap":   {},
+		"feDistantLight":      {},
+		"feDropShadow":        {},
+		"feFlood":             {},
+		"feFuncA":             {},
+		"feFuncB":             {},
+		"feFuncG":             {},
+		"feFuncR":             {},
+		"feGaussianBlur":      {},
+		"feImage":             {},
+		"feMerge":             {},
+		"feMergeNode":         {},
+		"feMorphology":        {},
+		"feOffset":            {},
+		"fePointLight":        {},
+		"feSpecularLighting":  {},
+		"feSpotLight":         {},
+		"feTile":              {},
+		"feTurbulence":        {},
+		"filter":              {},
+		"foreignObject":       {},
+		"g":                   {},
+		"image":               {},
+		"line":                {},
+		"linearGradient":      {},
+		"marker":              {},
+		"mask":                {},
+		"metadata":            {},
+		"mpath":               {},
+		"path":                {},
+		"pattern":             {},
+		"polygon":             {},
+		"polyline":            {},
+		"radialGradient":      {},
+		"rect":                {},
+		// "script": {},
+		"set":  {},
+		"stop": {},
+		// "style": {},
+		"svg":      {},
+		"switch":   {},
+		"symbol":   {},
+		"text":     {},
+		"textPath": {},
+		"title":    {},
+		"tspan":    {},
+		"use":      {},
+		"view":     {},
 	}
 )